Download AlphaFold DB predicted structures and confidence files by UniProt accession.
Download PDBe structure files as PDB and CIF by PDB ID.
Download UniProt protein sequence records as FASTA and JSON by accession.
Download BindingDB binding record files by BindingDB monomer ID.
Download InterPro protein family and domain records as JSON by InterPro ID.
Download QuickGO Gene Ontology term records as JSON by GO ID.
PDBFixer is an OpenMM-based tool used for fixing problems in protein/DNA/RNA structure files, including adding missing atoms, adding missing residues, and fixing improper formatting.
Convert Protein Data Bank files to Crystallographic Information File format
Convert Protein Data Bank files to FASTA sequence format
Download ChEBI chemical entity records as JSON by ChEBI ID.
Download AlphaFold DB predicted structures and confidence files by UniProt accession.
Download PDBe structure files as PDB and CIF by PDB ID.
Download UniProt protein sequence records as FASTA and JSON by accession.
Download BindingDB binding record files by BindingDB monomer ID.
Download InterPro protein family and domain records as JSON by InterPro ID.
Download QuickGO Gene Ontology term records as JSON by GO ID.
PDBFixer is an OpenMM-based tool used for fixing problems in protein/DNA/RNA structure files, including adding missing atoms, adding missing residues, and fixing improper formatting.
Convert Protein Data Bank files to Crystallographic Information File format
Convert Protein Data Bank files to FASTA sequence format
Download ChEBI chemical entity records as JSON by ChEBI ID.
Configure inputs to begin
Set options on the left, then click “Fetch downloads” — or start from an example.
1CRN
4HHB
1Q0L
PDB Download fetches coordinate and sequence files from RCSB PDB using a 4-character PDB ID. It returns PDB, CIF, and FASTA download links in the results panel.
Use this tool when you already know the structure ID and want the raw files for visualization, conversion, sequence extraction, structure repair, or downstream structural analysis.
| Input | Description |
|---|---|
Entry ID | Four-character PDB ID. Examples: 1CRN, 4HHB, 1Q0L. |
| Setting | Description |
|---|---|
Database | Opens the selected database download tool. |
Output format | Return all files, PDB, mmCIF, or FASTA. |
| File | Format | Use |
|---|---|---|
| PDB | .pdb | Legacy coordinate format accepted by many structure tools. |
| CIF | .cif | Modern mmCIF coordinate format with richer metadata. |
| FASTA | .fasta | Polymer sequences associated with the structure. |
The results panel lists each available file as a separate downloadable item. Structure files are remote downloads, while the Details tab provides the database, entry ID, file label, format, filename, and URL.
Filenames follow the pattern:
rcsb-1CRN-pdb.pdb
rcsb-1CRN-cif.cif
rcsb-1CRN-fasta.fastaIf you need the sequence from an uploaded structure instead of the RCSB record, use PDB to FASTA. If the structure needs cleanup before modeling, use PDB Fixer.
PDB is the older fixed-width coordinate format. CIF is the modern structure format used by the Protein Data Bank and can represent larger structures and richer metadata more reliably.
This download tool is intended for direct ID retrieval. Use /app/databases for broad text search, or enter a known PDB ID here.
The FASTA file is useful when you want the structure-associated polymer sequence without parsing coordinate records yourself.